4.Postpetiole attached to the dorsal surface of first gastral segment (Fig. 62); petiole dorsoventrally flattened and without a node (Fig. 62); gaster in dorsal view roughly hert-shaped and capable of reflexion over the alitrunk.
(collected in all Midwestern states)

...Crematogaster

&nbsp&nbsp&nbsp Postpetiole attached to the anterior face of the first gastral segment (Fig. 63); petiole with a conspicuous node (Fig. 63); gaster in dorsal view not roughly heart-shaped, not capable of reflexion over the alitrunk.